When he heard that four Jews had died in an attack on a kosher supermarket near his home, 16-year-old Natan Kalifa was overcome with grief, anger and a feeling of exclusion from French society.

He even contemplated staging an act of violence — possibly against Islamists who support the murders — he recalled Saturday at a vigil outside Hyper Cacher, the market where a 32-year-old jihadist took 21 people hostage and murdered four on Friday before he was killed by police.

Kalifa's distress was somewhat diminished after hearing French Prime Minister Manuel Valls in a speech at the vigil reiterate his commitment to French Jews. But Kalifa said he still plans to leave France for Israel as soon as he graduates from high school.

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